O 2 SENSORS – Zirconium Dioxide (ZrO 2 ) Sensor and Interface Selection Guide This document provides an overview of SST Sensing’s zirconium dioxide sensors and interface components; you will find information regarding important features such as housing types, response times, gas temperatures, heater voltages and best suited applications of particular sensor types. NOTE: This document is not intended to replace the product datasheets which are referenced within. For ordering information and detailed specifications please refer to the datasheets or contact [email protected].
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O SENSORS Zirconium Dioxide (ZrO Sensor and …...Gas temperature range:-100oC to +250oC Probe insertion distance: 28mm, 45mm or 55mm (relative to mounting nut). Mounting style: M18
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This document provides an overview of SST Sensing’s zirconium dioxide sensors and interface components; you will find information regarding important features such as housing types, response times, gas temperatures, heater voltages and best suited applications of particular sensor types.
NOTE: This document is not intended to replace the product datasheets which are referenced within. For ordering information and detailed specifications please refer to the datasheets or contact [email protected].
There are a number of options available which enable you to power and control SST’s range of zirconium dioxide oxygen sensors; interface board or a complete solution. The following gives a brief overview of the components, refer to 3.2 Specifications on page 3-3 for further details:
3.1.1 Interface Board – OXY-LC
Supply voltage:
8 – 28VDC (RS485 variant)
20 – 28VDC (analogue variants)
O2 measurement range:
0.1 – 100% (RS485 variant)
0.1 – 25% or 0.1 – 100% (analogue variants)
Operating temperature range: -30°C to +70°C
Output options: RS485 or 0 – 10VDC or 4 – 20mA
Termination: PCB screw terminals.
Features: Built in pressure sensor for barometric pressure compensation.
3.1.2 Interface Board – O2I-Flex
Supply voltage: 24VDC ± 10%
O2 measurement range:
0.1 – 100% (RS232 variant)
0.1 – 25% or 0.1 – 100% (analogue variants)
Operating temperature range: -10°C to +70°C
Output options: RS232, 0 – 10VDC and 4 – 20mA
Termination: Removable polarised screw terminals.
Features: Externally triggered automatic or manual calibration. Calibration can also be initiated via an on-board push button switch.
3.1.3 Complete Solution – Oxygen Measurement System
Supply voltage:
8 – 28VDC (RS485 variant)
20 – 28VDC (analogue variants)
O2 measurement range:
0.1 – 100% (RS485 variant)
0.1 – 25% or 0.1 – 100% (analogue variants)
Operating temperature range: -30°C to +70°C
Gas temperature range: -100°C to +250°C
Output options: RS485 or 0 – 10VDC or 4 – 20mA
Termination: PCB screw terminals.
Features: Built in pressure sensor for barometric pressure compensation.
Typical applications: Combustion control including oil, gas and biomass boiler applications.
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3.1.4 Complete Solution – OXY-Flex
Supply voltage: 24VDC ± 10%
O2 measurement range:
0.1 – 100% (RS232 variant)
0.1 – 25% or 0.1 – 100% (analogue variants)
Operating Temperature Range (electronics): -10°C to +85°C
Gas temperature range (at probe tip):
-100°C to +250°C (standard variant)
-100°C to +400°C (high temp variant)
Output options: RS232, 0 – 10VDC and 4 – 20mA
Termination: Amphenol Ecomate C016 30C006 100 12.
Features: Externally triggered automatic or manual calibration. IP65 rated housing.
Typical applications: Combustion control including oil, gas and biomass boiler applications. Long probe lengths are ideal for thicker walled flues.
3.1.5 Complete Solution – OXY-COMM
Supply voltage: 8 – 15VDC
O2 measurement range: 0.1 – 100%
Operating Temperature Range: -40°C to +60°C
Output options: RS485
Termination: Brad Harrison style 4-pin M12 connector
Features: Calibration through Modbus. IP65 rated housing. Built in pressure sensor for barometric pressure compensation.
Typical applications: Refrigerated/controlled atmosphere transportation (“Reefer”) containers. Fire prevention in facilities such as server rooms, or document storage. Protecting historical artefacts against oxidation.
Alternatively, if you are not using one of SST Sensing’s interface boards for sensor control and
conditioning, refer to AN-0113, Zirconia O2 Sensor Software and Hardware Design Guide.
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3.2 Specifications
The following section provides high-level interface specifications; for full details, refer to the product
datasheet (see REFERENCE DOCUMENTS for details).
3.2.1 OXY-LC
For full specification details, refer to the datasheet.
3.2.1.1 Technical Specifications
Sensor Response
Time T10 – 90
Heater Voltage
Supply Voltage
Digital Output
Analogue Output
O2% Measure
Range
OXY-LC-A25-
400 15 secs
4.00Vc
20 – 28VDC
PWM (for
diagnostics &
calibration)
4 – 20mA
0.1–25% 420 4.20Vd
435 4 secs
4.35Vc
455 4.55Vd
OXY-LC-A100-
400 15 secs
4.00Vc
0.1–100% 420 4.20Vd
435 4 secs
4.35Vc
455 4.55Vd
OXY-LC-V25-
400 15 secs
4.00Vc
0 – 10V
0.1–25% 420 4.20Vd
435 4 secs
4.35Vc
455 4.55Vd
OXY-LC-V100-
400 15 secs
4.00Vc
0.1–100% 420 4.20Vd
435 4 secs
4.35Vc
455 4.55Vd
OXY-LC-485 15 secs Adjustable
(4.35V default)e
8 – 28VDC RS485 N/A 0.1–100% 4 secs
c Short cable length (<150mm). d Long cable length (>150mm). e Standard and fast response time sensors with any cable length up to 1m.
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3.2.1.2 Product Dimensions
Dimensions in mm unless otherwise stated.
Figure 3-1 Product Dimensions - OXY-LC
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3.2.2 O2I-Flex
For full specification details, refer to the datasheet.
3.2.2.1 Technical Specifications
Sensor
Response Time
Heater Voltage
Supply Voltage
Digital Output
Analogue Output
O2% Measure
Range
O2I-FLEX
15 secs 4.00V
24VDC RS232 4 – 20mA
and 0 – 10V
0.1–25% (analogue
output)
4 secs 4.35V
(default)
0.1–100% (digital output)
3.2.2.2 Product Dimensions
Dimensions in mm unless otherwise stated.
Figure 3-2 Product Dimensions - O2I-Flex
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3.2.3 Oxygen Measurement System
The oxygen measurement system is a complete solution consisting of a zirconium dioxide sensor and
an interface board.
For full specification details, refer to the datasheet.
f Standard temperature (-100 to +250°C) at probe tip; probe length 220mm. g High temperature (-100 to +400°C) at probe tip; probe length 220mm. h Standard temperature (-100 to +250°C) at probe tip; probe length 400mm. i High temperature (-100 to +400°C) at probe tip; probe length 400mm.
DS-0122 Zirconia O2 Sensors Probe Series - BM Screw Fit Housing – Datasheet
DS-0131 Zirconia O2 Sensors Probe Series - Long Housing – Datasheet
CAUTION Do not exceed maximum ratings and ensure sensor(s) are operated in accordance with their requirements. Carefully follow all wiring instructions. Incorrect wiring can cause permanent damage to the device. Zirconium dioxide sensors are damaged by the presence of silicone. Vapours (organic silicone compounds) from RTV rubbers and sealants are known to poison oxygen sensors and MUST be avoided. Do NOT use chemical cleaning agents.
Failure to comply with these instructions may result in product damage.
INFORMATION As customer applications are outside of SST Sensing Limited’s control, the information provided is given without legal responsibility. Customers should test under their own conditions to ensure that the equipment is suitable for their intended application.
For technical assistance or advice, please contact
General Note: SST Sensing Ltd. reserves the right to make changes to product specifications without notice or liability. All information is subject to SST Sensing Ltd.'s own data and considered accurate at time of going to print.